activity
20212025
most citedChasing the Tail of Cosmic Reionization with Dark Gap Statistics in the Ly Forest over

75 citations · 217 across the 14 of their papers we have counts for

collaborators

14 papers

astro-ph.CO2025★ 7 cited

Updated dark pixel fraction constraints on reionization's end from the Lyman-series forests of XQR-30

Frederick B. Davies, Sarah E. I. Bosman, Valentina D'Odorico +16

The fraction of "dark pixels" in the Ly and other Lyman-series forests at provides a powerful constraint on the end of the reionization process. Any spectral region…

astro-ph.GA2025

Galaxy Underdensities Host the Clearest IGM Ly Transmission and Indicate Anisotropic Reionization

Yongda Zhu, George D. Becker, Anson D'Aloisio +6

How galaxies drive reionization and what governs its geometry remain fundamental questions. We present JWST/NIRCam wide-field slitless spectroscopy (WFSS) observations toward two o…

astro-ph.GA2025★ 3 cited

Ly Emission from [OIII] Emitters Near Reionization: The role of environment in galaxy Ly detection

Seyedazim Hashemi, George D. Becker, Yongda Zhu +1

Using galaxy Ly emission to probe reionization relies on establishing baseline expectations for its detectability in the absence of attenuation by neutral gas in the IGM. Toward…

astro-ph.GA2025

A massive HI-absorption-selected galaxy at

Balpreet Kaur, Nissim Kanekar, Marcel Neeleman +4

We use the Karl G. Jansky Very Large Array (VLA) and the Atacama Large Millimeter/submillimeter Array (ALMA) to detect , , and rest-frame 349-GHz continuu…

astro-ph.CO2024★ 2 cited

Percent-level timing of reionization: self-consistent, implicit-likelihood inference from XQR-30+ Ly forest data

Yuxiang Qin, Andrei Mesinger, David Prelogović +13

The Lyman alpha (Lya) forest in the spectra of z>5 quasars provides a powerful probe of the late stages of the Epoch of Reionization (EoR). With the recent advent of exquisite data…

astro-ph.GA2024

No Redshift Evolution in the Fe II/Mg II Flux Ratios of Quasars across Cosmic Time

Danyang Jiang, Masafusa Onoue, Linhua Jiang +13

The Fe II/Mg II emission line flux ratio in quasar spectra serves as a proxy for the relative Fe to alpha-element abundances in the broad line regions of quasars. Due to the expect…

astro-ph.CO2024★ 52 cited

Damping Wing-Like Features in the Stacked Ly Forest: Potential Neutral Hydrogen Islands at

Yongda Zhu, George D. Becker, Sarah E. I. Bosman +28

Recent quasar absorption line observations suggest that reionization may end as late as . As a means to search for large neutral hydrogen islands at , we revisi…

astro-ph.GA2024★ 25 cited

Multi-phase black-hole feedback and a bright [CII] halo in a Lo-BAL quasar at

Manuela Bischetti, Hyunseop Choi, Fabrizio Fiore +18

Although the mass growth of supermassive black holes during the Epoch of Reionisation is expected to play a role in shaping the concurrent growth of their host-galaxies, observatio…

astro-ph.CO2024★ 3 cited

Damping wing absorption associated with a giant Ly trough at : direct evidence for late-ending reionization

George D. Becker, James S. Bolton, Yongda Zhu +1

Multiple observations now suggest that the hydrogen reionization may have ended well below redshift six. While there has previously been no conclusive proof of extended neutral isl…

astro-ph.CO2024★ 49 cited

Damping wings in the Lyman-α forest: a model-independent measurement of the neutral fraction at 5.4<z<6.1

Benedetta Spina, Sarah E. I. Bosman, Frederick B. Davies +2

Recent observations have positioned the endpoint of the Epoch of Reionisation (EoR) at redshift . However, observations of the Lyman- forest have not yet been able t…

astro-ph.CO2024

IGM damping wing constraints on the tail end of reionisation from the enlarged XQR-30 sample

Bradley Greig, Andrei Mesinger, Eduardo Bañados +16

The attenuation of Ly photons by neutral hydrogen in the intergalactic medium (IGM) at continues to be a powerful probe for studying the epoch of reionisation. Given…

astro-ph.CO2023

Constraints on the Evolution of the Ionizing Background and Ionizing Photon Mean Free Path at the End of Reionization

Frederick B. Davies, Sarah E. I. Bosman, Prakash Gaikwad +16

The variations in Ly forest opacity observed at between lines of sight to different background quasars are too strong to be caused by fluctuations in the density field a…

astro-ph.CO2023★ 1 cited

The effect of reionization on direct measurements of the mean free path

Joshua T. Roth, Anson D'Aloisio, Christopher Cain +3

Recent measurements of the ionizing photon mean free path (MFP) based on composite quasar spectra may point to reionization ending at . These measurements are challenging beca…

astro-ph.CO2021★ 75 cited

Chasing the Tail of Cosmic Reionization with Dark Gap Statistics in the Ly Forest over

Yongda Zhu, George D. Becker, Sarah E. I. Bosman +14

We present a new investigation of the intergalactic medium (IGM) near the end of reionization using "dark gaps" in the Lyman-alpha (Ly) forest. Using spectra of 55 QSOs at $z_{\…